I loved the first one, I absolutely loved the second one and I appreciated for what it was worth the third one.
I think the gameplay became smoother and smoother and I'm expecting some advancement in Andromeda.
But on the opposite, I think the "story / plot" just got worse bit by bit, same with exploration.
ME2 was kind in the middle of everything, it's a good balance between scripted event / exploration / story and smooth gameplay. That character though, I mean Garrus, Thane, Legion, Samara, Mordin... Good memories.
It's probably the video game I've spent the most time on, I really loved the entirety, my only real complain goes with the third one which story is passable and exploration is down to 0. Every side mission just look like a generic multiplayer map, far from the originality ME2 side mission had.